Short-term Borrowings and Long-term Debt (Schedule of Long-term Debt Instruments) (Details) - USD ($) $ in Millions	9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Long-term debt due within one year
Balances as of February 1, 2022	$ 2,803
Proceeds from issuance of long-term debt	0
Repayments of long-term debt	(1,439)
Reclassifications of long-term debt	4,181
Other	(87)
Balances as of October 31, 2022	5,458	$ 1,575
Long-term debt
Balances as of February 1, 2022	34,864
Proceeds from issuance of long-term debt	4,969	6,945
Repayments of long-term debt	0
Reclassifications of long-term debt	(4,181)
Other	(1,717)
Balances as of October 31, 2022	33,935	36,425
Total
Balances as of February 1, 2022	37,667
Proceeds from issuance of long-term debt	4,969	6,945
Repayments of long-term debt	(1,439)	$ (13,010)
Reclassifications of long-term debt	0
Other	(1,804)
Balances as of October 31, 2022	$ 39,393